SF 49ers’ Joe Staley asserts himself

For someone who had a concussion a mere four days earlier, 49ers tackle Joe Staley played – and talked – a solid game Thursday night.

Not only did Staley and his fellow offensive linemen enable the 49ers to gain 175 yards on the ground, but Staley had a hand – or actually, a voice – in their lone touchdown.

One official initially ruled Delanie Walker out of bounds at the 1-yard-line on what ultimately was correctly ruled a 12-yard touchdown reception of an Alex Smith pass. That official got an earful from Staley.

“I thought (Walker) was in. I saw it,” Staley said. “I saw that his feet didn’t go out of bounds. I might have a referee job in my future.”

Staley’s past included another concussion, sustained last season in the Dec. 11 game against Arizona. Even with two concussions in less than a year, Staley said he was fully confident playing Thursday.

He had seen doctors Monday, went through non-contact drills Tuesday and then got cleared to play after taking part in contact drills Wednesday. One indication Staley had kept his wits about him: When he was told that Jim Harbaugh called the second half the most physical 30 minutes he had seen the 49ers play since he became head coach, Staley at first seemed ready to list a few other physical halves.

He quickly realized he didn’t want to contradict Harbaugh.

Said Staley: “Yeah, sure, I’ll agree. Whatever he says.”

Davis held without catch: Tight end Vernon Davis was held without a catch for the first time since 2008 and was not targeted with a pass. In last week’s loss to the Giants, had just two catches for 12 yards before grabbing a 25-yard reception with the 49ers trailing by 23 points with less than two minutes left.

“Some of the routes I usually run, they are taking them away,” Davis said. “The (routes) up the sideline, it’s not there. Nothing’s there. When I run my corner routes the cornerback is dropping to the corner. They are just taken stuff away, some of my explosive routes and stuff.”

Asked how he could adjust, Davis, who said he wasn’t frustrated as long as the 49ers win, was at a loss.

“That’s up to the offensive coordinator,” he said. “I don’t know what to do. I run my routes hard to get open but there’s nothing there. We’ll see, we’ll see.”

Briefly: Seattle wide receiver Doug Baldwin, who played for Harbaugh at Stanford, had two catches before leaving the game with an ankle sprain. … Dashon Goldson picked off a Wilson pass late in the third quarter. It was Goldson’s second interception of the season. … Colin Kaepernick had one carry for a loss of a yard on a 2nd-and-goal call from the Seattle 6 early in the fourth quarter. … The 49ers have won four straight over Seattle, their longest winning streak against the Seahawks. San Francisco leads the series 14-13.